CAMP LEJEUNE, N.C. (AP) _ One Marine was killed when he landed in a river on a night parachute training exercise, and three other Marines were injured, a base spokesman said Wednesday.

The body was found Wednesday in the Trent River.

The cause of the accident Tuesday night hasn't been determined.

''There are so many factors involved in this type of training,'' said Capt. Michael Imsick. ''They have to examine all those factors: gear, environmental conditions, individual Marines involved, the flight, the location, all those factors.''

Three other Marines suffered minor injuries when they landed in woods at a training area that is part of Camp Lejeune, but separate from the main base, Imsick said.

The training wasn't in preparation for duty in Saudi Arabia, another spokesman said.

The men were among six who jumped from a CH-53 Delta Sea Stallion helicopter. They were part of the 2nd Air Naval Gunfire Liaison Company, 2nd Surveillance, Reconnaissance and Intelligence Group at Camp Lejeune, Imsick said.

One of the injured was in intensive care Wednesday at the Naval Hospital at Camp Lejeune with burns suffered when he touched power lines. Another remained hospitalized with ''minor orthopedic injuries,'' Imsick said.

The names of the victims were withheld.